Threats Tagged 'infostealers'

Active since September 2025, Yurei is a double extortion ransomware campaign. The operators run their own Tor data leak site with a low number of victims listed at the time of writing. It is reportedly derived from Prince Ransomware, an open-source ransomware family written in Go. Check Point researchers noted that all samples were first submitted to VirusTotal from Morocco, and that one sample did not include a ticket ID, indicating that this could be a test build, possibly uploaded by the developer themselves. Yurei ransomware samples also contained a link to SatanLockv2, based on the presence of the PDB path string “D:\satanlockv2” present in the Yurei samples.

MediumCampaignMoroccoUnited StatesUnited Kingdom+7#yurei ransomware#netexec#netscan

Iranian intelligence services are increasingly engaging with the cyber crime ecosystem, leveraging criminal tools, services, and operational models to support state objectives. This trend is particularly evident among actors linked to the Ministry of Intelligence and Security (MOIS), such as Void Manticore and MuddyWater. These actors are not merely imitating criminal behavior but actively associating with the cyber criminal ecosystem, using its infrastructure, malware, and affiliate-style relationships. This approach enhances their operational capabilities, complicates attribution, and contributes to confusion around Iranian threat activity. Examples include the use of ransomware branding, commercial infostealers, and overlaps with criminal malware clusters. This shift from imitation to active engagement with cyber crime offers both improved deniability and expanded technical capabilities for Iranian actors.

MediumMalwareUnited StatesUnited KingdomIsrael+7#castleloader#muddywater#tsundere botnet

UNC5142, a financially motivated threat actor, has been tracked since late 2023 for abusing blockchain technology to distribute infostealers. The group exploits vulnerable WordPress sites and employs the 'EtherHiding' technique to obscure malicious code on the BNB Smart Chain. Their infection chain involves a multistage JavaScript downloader called CLEARSHORT, compromised WordPress sites, and smart contracts. UNC5142 has evolved its tactics, using a three-level smart contract system for dynamic payload delivery and abusing legitimate services like Cloudflare Pages. The group has distributed various infostealers, including ATOMIC, VIDAR, LUMMAC.V2, and RADTHIEF. Their operations have impacted multiple industries and geographic regions, with approximately 14,000 compromised web pages identified as of June 2025.

MediumMalwareGermanyUnited KingdomFrance+7#smart contracts#blockchain#cloudflare pages